Princess Madrun was the eldest
daughter of King Vortimer Fendigaid
(the Blessed) of Gwerthefyriwg (BS). She was probably named after
the Romano-British mother goddess, Matrona (DNF). Madrun had
married Prince Ynyr, a descendant of the
Emperor Magnus Maximus, at a young age
and, together, they ruled the Kingdom of Gwent after her fatherís death.
She was one of those present at her ageing grandfather Vortigern's last
stand and was forced to flee his burning castle of Tre'r Ceiri, for safety
in the nearby fort on Carn Fadrun (LBS).

Later, while on a pilgrimage to Ynys
Enlli (Bardsey Island),
Madrun and her handmaid, St. Annun, stopped for the night at Trawsfynydd.
Here they both had an identical dream in which they were commanded to
build a nunnery where they slept. Amazed by the co-incidence, they did as
required and the church there is dedicated to them still (Foulkes 1870).
In later years, Queen Madrun settled in Cerniw (Cornwall) with her son, St.
Ceidio. Together they evangelized the area around Minster, and it
was here that St. Madrun eventually died and was buried (Spencer 1991).